Method for fracture-separating an annular piece
AssigneeAlfing Kessler Sondermaschinen GmbH
InventorsMichael Hähnel, Horst Wisniewski
Life of this patent
Estimating the term…
Abstract
An apparatus fracture-separates an annular piece, such as a connecting rod. The apparatus includes one stationary and one mobile expandable jaw for insertion into a bore hole in the annular piece. An expanding device separates the expandable jaws. The fracture behavior of the annular piece can be influenced. To this effect, the peripheral surface of the expandable jaws is so configured that the expandable jaws engage in the inner surface of the bore hole only via a region of reference surfaces or lines which is defined locally with precision.
Claims23
An apparatus for crack splitting a connecting rod big-end having a bore with a cylindrical inner surface and a height in an axial direction, said apparatus comprising:
- a movable expander jaw including a first peripheral surface configured for engaging only a first portion of the inner surface of the bore, the first portion extending in a circumferential direction substantially perpendicular to the height, the first portion having a first span in the axial direction, the first span being less than the height;
- a fixed expander jaw opposing said movable expander jaw in a radial direction, said fixed expander jaw including a second peripheral surface configured for engaging only a second portion of the inner surface of the bore, the second portion extending in a circumferential direction substantially perpendicular to the height, the second portion having a second span in the axial direction, the second span being less than the height;
- and
- an expander device configured for causing said movable expander jaw to move in the radial direction away from said fixed expander jaw.
An apparatus for crack splitting a connecting rod big-end having a cylindrical bore with an inner surface and a first radius, said apparatus comprising:
- a movable expander jaw including a first arcuate peripheral surface configured for engaging only a first portion of the inner surface of the bore, said first arcuate peripheral surface defining a second radius, said second radius being greater than the first radius;
- a fixed expander jaw opposing said movable expander jaw in a radial direction, said fixed expander jaw including a second arcuate peripheral surface configured for engaging only a second portion of the inner surface of the bore, said second arcuate peripheral surface defining a third radius, said third radius being greater than the first radius;
- and
- an expander device configured for causing said movable expander jaw to move in the radial direction away from said fixed expander jaw.
An apparatus for crack splitting a connecting rod big-end having a bore with an inner surface and an axis, said apparatus comprising:
- a movable expander jaw configured for engaging only a first portion of the inner surface of the bore;
- a fixed expander jaw opposing said movable expander jaw in a radial direction, said fixed expander jaw configured for engaging only a second portion of the inner surface of the bore;
- an expander device configured for causing said movable expander jaw to move away from said fixed expander jaw;
- and
- a movable support configured for shiftably supporting the connecting rod big-end such that the axis of the bore is substantially perpendicular to a direction of movement of said movable expander jaw, said support being movable in a direction substantially perpendicular to the direction of movement of said movable expander jaw.
An apparatus for crack splitting a connecting rod big-end having a bore with an inner surface and an axis, the connecting rod having a small end, said apparatus comprising:
- a movable expander jaw configured for engaging only a first portion of the inner surface of the bore;
- a fixed expander jaw opposing said movable expander jaw in a radial direction, said fixed expander jaw configured for engaging only a second portion of the inner surface of the bore;
- an expander device configured for causing said movable expander jaw to move away from said fixed expander jaw;
- and
- a movable support configured for:
- shiftably supporting the connecting rod big-end such that the axis of the bore is substantially perpendicular to a direction of movement of said movable expander jaw;
- and
- contacting the small end of the connecting rod.
Dependencies are inferred from the claim text.